O.S. Engines® Multi-Cylinder 4 Strokes

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O.S. Engines® Multi-Cylinder 4-Strokes

Buy a new O.S. Engine between August 3rd and December, 31st 2009 and exchange the engine you're replacing for a valuable O.S. Engines merchandise certificate.
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And To Download Your Rebate Form. To take advantage of this Manufacturer's Mail-In Rebate Offer you must download and print the Rebate Form above. (file size 208K) Downloads Require Adobe Acrobat Reader 3.0 or higher.

The highest achievement of O.S. Engines’ manufacturing expertise.

FT-300 Gemini Twin

FR5-300 Sirius

FF-320 Pegasus

Incredibly realistic in both looks and sounds.

FT-160 Twin

Add the crowning touch to your giant-scale project: install an O.S. Multi-Cylinder or Twin 4-stroke engine! Ringed piston construction boosts durability. Ball bearings minimize friction and wear. Efficient carburetion adds reliability and fuel economy. Low vibration levels protect your carefully assembled airframe. Four-Stroke Twins include the FT-160, the “big-bore” version of the legendary FT-120II, and the FT-300, O.S. Engines’ largest horizontally opposed flat twin. The five-cylinder FR5-300 radial reproduces “Golden Era” looks. Four ball bearings and two needle bearings add smoothness. Only one R/C ringed piston “flat four” engine has ever been produced, and that’s the FF-320. Seven ball bearings add extra glide. All include mount, glow plugs, glow plug extension cables, locking prop nut assemblies and headers. 2-year limited warranty.

NOTE: O.S. recommends fuel with 5-10% nitro and a minimum of 16% lubricant for all twin-and multi-cylinder engines.